ACE3/addons/common/functions/fnc_getDefinedVariable.sqf

/*
 * Author: Glowbal
 * Grabs a variable. If variable has not been set, attempts to use default defined value
 *
 * Arguments:
 * 0: unit <OBJECT>
 * 1: Variable Name <STRING>
 *
 * Return Value:
 * Value of variable or default value, if the variable is undefined <ANY>
 *
 * Public: No
 */
#include "script_component.hpp"

params ["_unit", "_variable", "_defaultValue"];

private _value = _unit getVariable _variable;

if (isNil "_value") then {
    if (!isNil "_defaultValue") then {
        _value = _defaultValue;
    } else {
        private _definedVariable = _variable call FUNC(getDefinedVariableInfo);

        if (count _definedVariable > 1) then {
            _value = _definedVariable select 1;
        };
    };

    if (isNil "_value") then {
        _value = 0;
    };
};

_value